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Finding the Fourth Proportional to 520,087.65, 780,131.48 and 520,087.65

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Solution

The fourth proportional to 520,087.65, 780,131.48 and 520,087.65 is: 780,131.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,087.65 : 780,131.48 = 520,087.65 : x
  2. Step 2: Convert to fraction form
    520,087.65/780,131.48 = 520,087.65/x
  3. Step 3: Cross multiply
    520,087.65x = 780,131.48 × 520,087.65
  4. Step 4: Simplify right side
    520,087.65x = 405,736,745,523.78
  5. Step 5: Solve for x
    x = 405,736,745,523.78/520,087.65
  6. Step 6: Final answer
    x = 780,131.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.